Grit Blasting이 용사층의 밀착력에 미치는 영향에 관한 연구

Abstract

grit blasting의 공정변수가 모재의 표면조도와 용사층의 밀착력에 미치는 영향을 연구하였다. blasting각도, blasting 압력, 노즐과 시편의 겨리, 용사층의 두께, blasting 후 용사할 때 까지의 시간, 용사후 밀칙력 측정시까지의 시간 등의 변화가 밀착력에 미치는 영향을 조사하였다. blasting한 시편의 morphology와 밀착력 시험시 파괴의 모양도 아울러 조사 하였다.

Effect of various parameters of grit blasting on the surface roughness and the bond strength of sprayed layer were investigated. Blasting angle, blasting pressure, distance between nozzle and specimen, thickness of sprayed layer, time elapsed from grit blasting to thermal spraying and time delayed from thermal spraying to bond strength measurement were varied and their effects on bond strength were determined. Morphology of blasted specimens and failure mode of bond test were also studied.

Effect of various parameters of grit blasting on the surface roughness and the bond strength of sprayed layer were investigated. Blasting angle, blasting pressure, distance between nozzle and specimen, thickness of sprayed layer, time elapsed from grit blasting to thermal spraying and time delayed from thermal spraying to bond strength measurement were varied and their effects on bond strength were determined. Morphology of blasted specimens and failure mode of bond test were also studied.